This story is a sequel to The 7 Deadly Ponies: https://www.youtube.com/playlist?list=PLxgeRdDO0xnpkP6bl2nTV6fT0hV8lO6Pz

After ridding Equestria of the 7 Deadly Ponies, Wind, Fire, Water, and Earth went their separate ways for a while.

Now, with Princess Luna's help, they enter the world of dreams to stop an unknown threat from destroying all the good dreams of Equestria!